The pup is now 18 weeks old. I haven't had a single accident in the house during the last week, because the back door has been wide open. He has happily gone out when he needs to and done his business in the garden. Yet, if the door is shut (as it was just now), he pees in the hall. He doesn't 'ask' to go out (Jas taps the back door, or softly woofs). Any ideas on how I can train him to 'ask' to go out? I didn't have to with Jas, he just did.